
?? ??? ???????
java ??? ???? ????. Java?? ????? ??? ??? C++ ???? ??? ?? ??? ???? ? ???? ???? ??? ??? ?? ? ??? ???? ? ? ?? ???? ??? ?????.
Nov 18, 2019 am 10:03 AM
Java? ?? gc? ???????
java? gc? ????? ???? ??? ????. 1. YGC? ?? Eden ??? ??? ? ??????. 2. FGC? ?? old ??? ???? perm ??? ??? ? System.gc()? ??? ? ??????. .
Nov 18, 2019 am 09:46 AM
?? long int? ???
Java long int? ???? ??? ????. 1. 16?? ????? long? 4????? int? 2??????. 2. 64?? ????? long? 8????? int? 4??????. , long? 64???? int? 32?????. 4. long? ??? int? ???? ???.
Nov 16, 2019 pm 05:12 PM
??? ?? ??????
Java? Sun Microsystems?? ??? ????? ?????. .java ?? ??? Java? ?? ?? ?????. Java? ??? ??? ? ?? ?? ??? ??? ??? PC, ??? ??, ?? ?? ??? ? ?? ???? ?? ?????.
Nov 16, 2019 pm 04:50 PM
Java?? ???? ??????
Java?? ???? ??? ???? ???? ????? ?????. ?? ??, "String php = "good";"? ?? php? ??? good? ????? ?????. ???? ??? ??? ?? ???? ?? ??? ? ??? ???? ????.
Nov 16, 2019 pm 04:29 PM
Java?? ?? ??? ??????
Java ??? ?? ??? ??? ??? ???? "???" ?? ??? ?????. ?? ?? Hero h = new Hero(), h? new Hero() ??? ?? ?????.
Nov 16, 2019 pm 04:18 PM
Java?? ??? ?? ???? ???? ??
Java?? ??? ?? ???? ???? ??: ?? Scanner ???? ??? ?? Scanner ??? ??? ???? ??? ?? ???? ???? ???. ????? ??? ?? ???? ???? ???? ??? ? ????.
Nov 16, 2019 pm 04:06 PM
Java ?? ???? ?? ??? ????.
?? ??? ???? ?? Java ?? ??? ??? ????. 1. public static?? ??? 2. ??? ??? main???. 3. ????? ??? ??? ?????. ??? ??? ???? ??? Java?? ?? ???? ??? ? ????.
Nov 16, 2019 pm 04:04 PM
?? ???? ??? ????
Java ???? Windows ???? ????. jre? ??? ?? Windows ???? Java ???? ?????.
Nov 16, 2019 pm 03:40 PM
Java? ??? ???? ???? ???? ???
Java?? ??? ???? ???? ???? ???: ??? ???? ???? ??? ? ??? ??? ????? ?? ? ?? ???? ??? ? ?? ??? ??? ?? ?? ??? ? ??? ???? ???? ??? ???? ???. ??? ??? ???? ??.
Nov 16, 2019 pm 03:12 PM
Java?? ????? ???? ???? ??????
Java?? ????? ???? ???? ??? ????. 1. Trim(), Trim() ???? ???? ?? ?? ??? ???? ? ?????. 2. Split(), Split() ???? ??? ??? ?? ??? ?????. ??? ??? 3. substring(), substring() ???? ???? ?? ???? ?????.
Nov 16, 2019 pm 03:00 PM
Java?? ??? ??? ??? ??? ???
Java?? ??? ??? ??? ??? ???? ??? ????. ??? ??? ????? ??? ????? ??? ??? ???? ?? ?? ?????.
Nov 16, 2019 pm 02:45 PM
Java ????? ??? ? ?? ???? ?? ? ??? ??? ? ??? ???? ?????.
java? ?? ???? ?? ? ??? ??? ? ??? ???? ???? ??: ????? java ???? CLASSPATH ?? ??? ??? ????? ?? ??? ??? ??? ?????. ???: CLASSPATH ?? ??? ".;"? ??????.
Nov 16, 2019 pm 02:31 PM
Java ??? ??? ??? ?????.
Java ??? ??? ??? ???? ??: ??? ???? ????? GBK? ?? ?? ??? ????? ?????. ?? ??: Java ???? ???? utf8??? ??? ???? utf8? ????? ?? ???.
Nov 16, 2019 pm 02:14 PM
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